JPH0240825A - Electromagnetic relay - Google Patents

Abstract

PURPOSE:To reduce the generation of abrasion powder and to stabilize the displacement of an armature by forming an uneven part to be a rotation fulcrum of the armature, which is made of a resin mixed with a lubricant resistance, at a part of a hinge point which is formed of the armature and a yoke or a core. CONSTITUTION:At the center at one side of an armature 11, a semicylindrical hinge point projection 22 and an insulator 25 in which replaceable holders 23 and 24 of movable springs are formed in the molding. In this case, the molded members are made of a resin a lubricant substance is mixed. Since the hinge point projection 22 is geared with a hinge point recess 20, the armature 11 is displaced at the hinge point recess 20 and the projection 22 as the rotation fulcrum in an operation. In this case, the hinge point recess 29 and the projection 22 are formed of a resin a lubricant substance is mixed, little abrasion powder is generated even though the both members are rubbed each other in every operation. Consequently, the generation of the abrasion powder is reduced and the displacement of the armature is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Prior to Industrial Use] The present invention relates to an electromagnetic appliance with an improved hinge point structure.

[Conventional technology]

FIG. 5 is a schematic diagram of the electromagnetic relay, in which 1 is a yoke and 2 is an armature. A coil 3 is wound around the yoke 1, and an armature 2 is provided in contact with the yoke 1 at one end. Note that this contact point forms a hinge point P that serves as a pivot point for the armature 2. Further, 4 is a hinge spring, one end of which presses against the armature 2, and the other end is fixed. With such a configuration, when the coil 3 is energized, the electromagnetic force causes the tip of the armature 2 to be displaced in the direction of the arrow. As a result, a break contact and a make contact (not shown) open and close in response to the armature 2. Note that when the coil 3 is deenergized, the armature 2 returns to its original position.

[Problem to be solved by the invention]

By the way, when the armature 2 is displaced about the hinge point P, the metals of the armature 2 and the yoke 1 rub against each other, producing abrasion powder. This abrasion powder is not produced so much when the operation is performed several thousand times, but when the number of operations is increased to, for example, 10,000 times or more, it is generated to the extent that it becomes a problem in terms of characteristics. When such abrasion powder is generated, the abrasion powder gets caught in, for example, a break contact or a make contact, and obstructs the contact operation. Particularly in the case of small-sized electromagnetic relays, the break and make contacts are small in size, which hinders the operation of each contact.

Further, since the armature 2 and the yoke 1 are in line contact, the hinge point is not constant when the armature 2 is displaced, making it very unstable.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electromagnetic relay that can reduce the production of wear particles and stabilize the displacement of an armature.

[Means to solve the problem]

The present invention is an electromagnetic relay that attempts to achieve the above object by forming an uneven part that serves as a rotational fulcrum of the armature using a resin mixed with a lubricating substance in a part of the hinge point formed by the armature and the yoke or core. be.

[Effect]

By providing such a means, the armature rotates about the uneven portion formed by the resin mixed with a lubricating substance as a fulcrum. Therefore, friction between the resins reduces the amount of abrasion powder and stabilizes the displacement of the armature.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded configuration diagram of an electromagnetic relay. In the figure, 10 is a core and 11 is an armature. core 1
0 is formed into a rod shape, and specifically includes a core body 12, a plate-shaped core auxiliary body 13 provided at both ends of the core body 12, and a core auxiliary body 14 in which a concave cut portion 14a is formed. is formed from. Then, a coil bobbin 15 is molded into the core body 12 of the core 10 using a resin mixed with a lubricating substance, and at the same time as this molding, each insertion groove 18 and 19 of the coil terminal 16 and 17 is molded. ing. Furthermore, four hinge points 20 each having a groove-shaped bottom with a curved bottom are molded in the notch 14a of the core auxiliary body 14 using the resin at the same time as the above molding. Therefore, each coil terminal 1 is inserted into each insertion groove 18, 19.
6.17 is inserted, and a conducting wire is wound around the coil bobbin 15 to form the coil 21.

On the other hand, the armature 11 is formed into a quadrilateral shape, and a quadrilateral hollow part 21 is formed in the center thereof so that the coil 21 is arranged. In the center of one side of the armature 11, an insulator 25 is molded, in which a semicylindrical hinge point convex portion 22 and a movable spring movable holding portion 23, 24 are formed. Note that this mold member is made of resin mixed with a lubricating substance.

By the way, this hinge point convex portion 22 has a shape that fits into the hinge point concave portion 20, and for its specific structure, refer to FIG. 2 and FIG. 3 showing the AA cross section. and explain. As shown in FIG.
4a. On the other hand, as shown in FIG. 3, the hinge point convex portion 22 is formed so that only the hinge point convex portion 22 extends from one side of the armature 11 to the other side. Therefore, when the hinge point convex part 22 fits into the hinge point concave part 20, the core auxiliary body 14 and the armature 11 are in contact area F1.
* Contact is made at F2. In addition, each displaceable holding part 23.24 holds each movable spring 26.27 so that it can be displaced.

Further, 28 is a base, and this base 28 is the core 10.
The coil 21 is integrally attached to the armature 11, and the magnet 29. A yoke 30 is attached. The base 28 also has six grooves 31 to 31 into which terminals for forming break contacts and make contacts (not shown) are inserted.
36 are formed.

With this configuration, each coil terminal 16.1
7 are inserted into each insertion groove 31 and 34 respectively, and the coil 2
1 is attached to the base 28.

Also, each movable spring 26, 27 is attached to a respective displaceable retainer 23, 24 on the armature 11, and in this state the armature 11 is attached to the base 28.

By the way, at this time, the hinge point convex portion 22 is fitted and attached to the four hinge point portions 10. The armature 11 and the auxiliary core 14 have contact areas F1 on both sides of the hinge point recess 20 and the convex portion 22.
Contact at F2. Then, the magnet 29 and yoke 30 are attached. FIG. 4 is an external view of the assembled electromagnetic relay.

When assembled in this manner and the coil 21 is not energized, the armature 11 is separated from the yoke 30, the break contact is closed and the meter contact is open. When the coil 21 is energized in this state, the tip position of the armature 21 is displaced by the electromagnetic force using the hinge point recess 20 and the projection 22 as pivot points. This displacement of the armature 21 opens the break contact and closes the make contact.

Now, when operating as described above, the armature 11 is displaced using the hinge point recess 20 and the protrusion 22 as pivot points. In this case, the hinge point recess 20 and the protrusion 2
2 are both made of resin mixed with a lubricating substance, so even if they rub during each operation, there will be little abrasion powder. Note that the armature 11 and the core auxiliary body 14 are connected to each other in each contact area F1. F2
However, these contact areas F1. At F2, the entire load is not applied from the armature 11 to the core auxiliary body 14, but the core auxiliary body 14 is merely in contact.

Therefore, hardly any wear powder is produced in these regions F, , F2.

In addition, since the hinge point is formed by fitting the hinge point concave portion 2° and the hinge point convex portion 22, the armature 11 does not deviate in its vertical, horizontal, and longitudinal positions with respect to the core auxiliary body 14, and the rotational fulcrum is maintained. Stabilize.

Note that the present invention is not limited to the above-mentioned embodiment, and may be modified without departing from the spirit thereof. For example, in the electromagnetic relay described above, the armature 11 contacts the core 1o to form a hinge point, but the present invention may also be applied to a relay in which the armature contacts the yoke to form a hinge point.

〔Effect of the invention〕

As described in detail in Section 1 below, according to the present invention, a portion of the hinge point formed by the armature and the yoke or core is formed with a concave and convex portion made of resin to serve as a pivot point for the armature, thereby reducing the generation of wear particles. Electromagnetic # that can stabilize the displacement of the armature while eliminating the We can provide electrical appliances.

[Brief explanation of the drawing]

1 to 4 are diagrams for explaining one embodiment of an electromagnetic relay according to the present invention, and FIG. 1 is an exploded configuration diagram;
2 and 3 are structural diagrams of the hinge point, FIG. 4 is an external view, and FIG. 5 is a diagram for explaining the prior art. 10...core, 11...armature, 15...
Coil bobbin, 20... Hinge point recess, 22...
... Hinge point convex part, 25 ... Insulator, 26.2
7...Movable spring, 28...Base, 30...Yoke. Figure 2 Applicant's agent Patent attorney Takehiko Suzue Figure 3

Claims (1)

[Claims] An electromagnetic relay characterized in that a portion of a hinge point formed by an armature and a yoke or a core is formed with an uneven portion (20, 22) made of resin to serve as a pivot point for the armature.